Vtm render-theme with pg_tileserv

[Neo003]

Hi everyone,

I try to use VTM on Android in order to display OSM vector tiles from a pg_tileserv server.

I've loaded some OSM data from Geofabrik into a PostGIS database with osm2pgsql tool with a command like: osm2pgsql -U postgres -W -d osmDatabase -H localhost france-latest.osm.pbf. This command generates planet_osm_line, planet_osm_point, planet_osm_polygon and planet_osm_roads tables without errors.

I've checked that pg_tileserv serves tile layers correctly by using the web interface at http://localhost:7800. I can see tiles without styling (everything is rendered in blue color, but it's correct).

Next, in an Android Studio project based on the MapilionMvtActivity, I've used a modified MapilionMvtTileSource (I've changed the DEFAULT_URL to point my pg_tileserv url).

Finally, I've studied the render-theme documentation and the default.xml file rules but I don't understand why my map never shows the vector tiles from my pg_tileserv server with the Vtm default theme. Actually, none of the embedded themes work.
I think I've misunderstood something about the render-theme rules but I don't find what.

Can someone help me ?

Thanks.

[devemux86]

The render themes render the map elements based on rules that use tags,
the official OpenStreetMap tags or modified (as OpenMapTiles / Mapilion).

[Neo003]

Thanks for your response. As a base for studying, can you show me an example of a render theme code with official OSM tags ?
Thanks

[devemux86]

As a base for studying, can you show me an example of a render theme code with official OSM tags ?

• The Default or Osmarender themes use the official OpenStreetMap tags.
  Mapsforge maps are created with the official OpenStreetMap tags (tag-mapping).
• There is the OpenMapTiles theme used in Mapilion, because of the OpenMapTiles vector tile schema changes.